Alexander b



Nam 27, Re. 15,726

' A. B. coHN- v FRICTION DRIVE FOR SEWING MACHINES Original Filed May 2. 1917 IIIIIIIIIIIA 11v VENTOR.

- A TORNEYS.

. i j I p p p Re. 15,726 g uNl'T- ofsTAres am" OFFICE.

.. I ALmHlJE'KB. coma, or nnwfronx, n. v.

I momma nmvn ron sxwme xscnmns. Original In; 1,859,153, datedlovember 16,'1920, -S e r 1 ll" l'o. 185,947, fled my 2, 1917. Application or reissue flease tembe 9,' 1981. Serial m. 4aa,5e'e.- I J '1 all whom it may concern: 1 y I standard make or desi n, and are preferably Be it known that I, Amxxuonn 13. Conn, mounted upon a suitab e support or table 11.. a citizen of the UnitedStates residing at xln factories and the like the machines are New York cit ,boro of Manhattanin usually arranged in parallel rows, and are .5 the county'an State o gNew'YorKhave 1 adapted to have power furnished to the same t d. ew and Improvements in through the agency of a driven shaft jour- F i ti Drives Sewing- Machi ne's, of naled in bearin s situated between the rows which the following is'a specificatflionof sewing mac ines, and disposed beneath This invention relates to power'transmitthe glarment-receiving trough 12. Rather 10 ting mechanism 'd-has for'an objecttoprocomp icated and inconvemently operated 05 vide improvedmechanism of this character controlling mechanism has hitherto beenemfor service in 'con'u'nction with sewing maployed to transmit rotary motion from the chines, whereby t e operation of the latter driver shaft to the sewing machines, and it will be subject to theconvenient control of is the aim of the present invention to sim- 15 their respective operators. plif Y and improve such mechanism so as to Another object of the invention resides in ren er its operation more efiective and efiiequipping sewing machines, of the type uticient. lized in factories and similar establishments, 4 To this end a driver shaft 13 is journaled with novel power imparting means, consistfor rotation within bearings 14, secured to 2o ing of a swinging wheel operable to be and dependin from the under surface of the brought into contact with a constantly rotrough 12, an said shaft is adapted to carry tated driver wheel by a simple movement of one or more keyed driver wheels 15, the lat- [the operators knee/whereby the movement ter being proportioned one to each group will beimparted to the former wheel to effect of two machines. The wheels 15 may be 2 the operation of a. sewing machine, the formed from any desired material, such as mechanism being so constructed that upon will be eflicient when employed in friction removal of the operators knee therefrom the gearing. sewing machine will be automatically In the trough 12 and disposed transversely sto ped. thereof 'is a. housing or pocket 15 for the V 3" ther objects will be in part obvious and driving member or driver wheel 15which in part pointed out hereinafter. housing serves the additional function of a The invention accordingly consists in the partition to divide the trough 12 into comnovel features of constructlon, combination partments. The walls of said pocket pro- I of'elements and arrangementof parts, hereject into'the trough as shown. 35 inafter more fully desc bed, and pointed Adapted to operate with each of the out particularly in the appended claims. wheels 15 are driven wheels 16, each of the In the drawing: latter being carried by shafts 17, rotatably Figure 1 is a front elevation of the sewing ournaled 1n swingin' bearings 18, pivoted machine drivin mechanism comprising the to the lower bifurcat extremities of hanger 40 preferred emb imentof the present invenbrackets 19, said brackets being suitably-setion v cured to the under surfaces of the table 11, Figure 2 is a transverse sectional view and extend downwardly on substantially taken along the line 2-2 of Figi-L vertical planes. The upper ends of the Pi re 3 is a similar-view, t e plane of bearings 18 are formed to provide angular- 45 whic being disclosed by the line 3-3 of ly extending arms 2O,term1nating in down- Fio' 1, I wardly disposed ofi'set extremities 21. Coiled iigplre 4 is a detail perspective view of springs 22 are interposed between the exthe 'fting levers. tremities 21 and the lower ends of the fixed Similar characters of reference denote like brackets 19, and serve to oscillate the bear- 5 arts throughout the several views of the ings 18 outwardly, so that the-wheels 16 will 10! rawing. normally be maintained out of frictional Referrin more particularly to thestruccontact with the driver wheel 15. tural detai .of the invention, the invention In order. to force the wheels 16 into envis employed in connection with one or more gagement with the drivers. 15, use is 'made 65 sewing machines 10, the latter'being of any of shafts 23, which are rotatably mounted within fixed bearings 24, secured to the lower wall of the trough 12, or any other convenient position. Fixed crank arms are provided upon the inner ends of the shafts 23, and extending from said arms to the bearings 18 are connecting links 25, whereby upon the rotation of the shafts 23, the

brackets will oscillate to bring the wheels 16 into en agement'wit-h the driver wheels 15.

To effect the rotation of the shafts 23, the outer extremities of the latter are provided with fixed depending crank arms 26, which are connected by means of links 27. to the extremities of hell crank lever-28, the latter being pivotally supported by means of brackets 29, depending from the table 11. The levers 28 are provided with downwardly extending arms 30, on which are adjustably mounted knee plates 31, the latter being preferably located contiguous to the left knees of operators governing the sewing machines. Thus it will be evident that by slightly pressing the plates 31, the driven rollers will be brought into engagement with the driver wheels so that the shafts carrying said rollers will be thrown into a state of rotation.

The movement of the last mentioned shafts is imparted to the machines 10 by providing pulley wheels 32 thereon, and belts or their equivalents 33 are; trained over said pulleys and over similar elements 34L carried by the drive shafts of the sewing machines, whereby when the rollers are in engagement with the driver wheels, the machines will be in active operation, but when the plates 31 are released, said rollers will be thrust away from the drivers to effect the stopping of said sewing machines.

From the foregoing it will be seen that there is provided mechanism whereby the objects of the invention have been achieved, and that all of the advantageous features above mentioned are, among others, present. The mechanism is of a substantial, simple and efiicient character, reliable and effective in operation, and not likely to become out of. order. The movable part of the mechanism may be incased if desired so as to prevent lint, dust and like foreign matter from collecting on and interfering with the operation thereof.

Having described the invention what is claimed is:

l. The combination of a table, a sewing machine mounted thereon, a driver wheel supported below the table, a hanger bracket on the table, a bearing pivotally connected to said hanger bracketand arranged to swing toward and from the driver wheel and having an angularly disposed arm and an angularly disposed extremity on said arm and spaced from the hanger bracket, a coiled spring interposed between said extremity and the hanger bracket, means carried by said bearing for deriving motion from the driver wheel, a driving connection inter mediate said means and the/machine on the table, a rock-shaft having cranks one of which is connected with the said bearing, a bell crank lever, a connection to other crank of the rock-shaft and one arm of said lever, and an angularly disposed portion on the other arm of the bell crank lever and carrying a knee plate.

2. In a. power driven sewing machine, the combination of a table, a sewing machine mounted thereon and provided with an operating shaft, :1 driver wheel below the table, a bearing connected with the table and mounted for swinging movement thereon toward and away from the driver wheel, rotatable means carried by the swinging bracket and adapted to be carried by the bracket into and out of engagement with the driver wheel, a driving connection between the rotatable means and the operating shaft of the machine, a member adapted to be moved by the knee of the operator, and a connection between the knee operated member and the swinging bearing, whereby said member may be actuated by the knee of the operator to bring the rotatable member into engagement with the driver wheel or permit the rotatable member to retract therefrom.

In testimony whereof, I atfix my signature.

ALEXANDER B. (JOHN. 

